Galvanic battery.



J. E. PRESTON.

GALVANIC BATTERY.

APPLICATION FILED AUG.3I, 1914.

L2? 37535; Patented Jan. 23, 1917.

l- I @an d] JOEE' PRESTON, 0F LNDON, ENGLAND.

GALVANIC BATTERY.

Specification of Letters Patent.

Patented J an. 23, 19t?.

Application led August 31, 1914. SerialgNo. 859,402.

'lationship with the containing vessel by more tightly binding thecomponent clamping parts together to put pressure upon the oppositefaces of the disk.

By and in accordance with thel present invention there is provided for aclosed galvanic battery cell a removable stopper unit ofthe type setforth wherein the insulated conducting means of the positive andnegative elements have passage through a common aperture in the elasticsealing disk whereby on compression of the disk a substantially'uniformflow of the disk in all radial directions is realized to effect a fluidtight sealing of the cell. Thus a fluid tight sealing is not precludedby variaticns in manufacture from a given size rof that por- Ation ofthe containing vessel whic` ccacts with the elastic disk; thesevariativs fing frequently met with and are difficuit to counter in caseswhere the flow of the disk is radially interrupted at any point. y

Inthe accompanying drawings the invention vis illustrated by way ofexample as applied to a single galvanic cell.

Figure 1 `is a sectional elevation of the cell. Fig. 2 is a sectionalelevation of a modified construction of a cell. -Fig 3 a plan view, andFig. i an under plan View thereof. Figs. 5 and 6 are sectional views ofmodified constructions of the elastic sealing disk.

Referring to Fig. 1 of the drawings, the

container 1, whether of glass, earthenware,

vulcanite, or other suitable material, is plugged iuid tight by anexpanding elastic disk 2, the upper surface of this being in Contactwith a cover plate 3. Through the expanding disk and cover plate therepasses the upper and reduced portion of a metal (lead or lead alloy typemetal by preference) cap or contact-piece a, cast on or fitted .to thecarbon or negative cylinder o which 1s conveniently cylindrical. Theupper part or reduced portion 6 of the cap or contact piece 4 isexteriorly furnished with a screw thread which is engaged by a wing-nut7, but this threaded portion of the contact piece a may conveniently bemade of a harder metal brass for example, or using type metal forexample it can be made in one piece with the contact piece l. The upperand reduced portion 6 of the cap or contact piece 4 is formed tubularand inside the tubulus is fitted an elastic plug' S of insulatingmaterial, or other appropriate acid proof and insulating packing throughwhich passes the screw threaded stem 9 rigidly connected to thecylindrical zinc or positive element 10, resting against the undersideof the elastic plug 8. An insulating washer 11 is mounted on the stem 9and restsagainst the plug 8. The positive ele-- ment 10 is securelyretained by compression of the elastic plug 8 between the element 10 andthe washer 11; this being accomplished by a wing nut 12 on the stem 9-which on being-tightened up draws the element 10 toward the plug 8. Ametal washer is interposed between'the wing nut 12 and the washer 11;this washer being` sufficiently large in diameter to extend over thepart 26 of the wing nut 7 to thereby prevent the nut 7 from becomingdetached when being unscrewed. l

By tightening up the wing nut 7 the elastic disk 2 is evenly compressedbetween the contact piece t and the cover plate 3 and seals the stopperby the lateral expansion and substantially uniform fiow of the elasticdisk when in the neck of the container 1.

Aln the modified construction according to Figs. 2, 3 and 4 of thedrawings, the container '1 is plugged fluid tight by the expandingelastic disk 2 and the carbon or negative cylinder 5 is secured in agroove 26 of a lead orpositive contact 13 and an effective anchorage ofthe carbon element in the contact can be secured by aperturing the endof the carbon element so as to admit of the lead flowing through theapertures of the carbon element. An interiorly and' exteriorly screwthreaded metal ferrule 11i is cast in the contact 13 and thereaftersweated or otherwise secured to the contact, or the ferrule 14 and thecontact 13 are made in one piece of type or other suitable metal. Aninsulating liner 15v formed with an in- 1 sulatin'gI flange 16 isscrewed into vthe ferrulev l let and airubber washer 17 isinterposed'between the ange 16 and the contact 13 and a rubber washer 2%between the positive element 10 and the fiange 16.' The screwthreadedstem 9 which is connected -to the positive or zinc element 10 passesthrough the liner 15 and is securely retained thereln by the wing'nut121co-acting with thel stern `9. Ametal washer is interposed between thewing nut 12 and the liner 15; this washerv being sufiiciently large indiameter to extendy over the part 7a of the wing nut,

Vto thereby prevent the latter from becoming detached when beingunscrewed. y

yBystightening` up the wing nut 7, the elastic disk y2 is evenlycompressed between the contact 13 and the cover plate 3 `and seals thestopper by the lateral expansion and substantially uniform flow of theelastic disk when in the neck of the-container l.

If .desired the insulating liner 15 can be "nationally heid in theferrule 14. The

upper end of the insulating liner 15 projectsl beyond 'the ferrule 14 in`order to avoid short v circuiting.

In both constructions the negative. element 5 is vfurnished withapertures 18 to i. permit the electrolyte to properly contact withtheipositive element F10.

The order of the elements may be reversed if desirable the zinc (orpositive element) -being a hollow cylinder and outside.

The fact of there being no perforation on the radius `of the elastic orrubber disk, opensa' path for the improvement of the disk by takingadvantage of the elasticity of included air, so that the disk may be'Inodi fied to take advantage of this fact, and as described belowbecomes a modification of the present invention. The rubber or elastic*diskl in this case takes the form of a hollow l elastic inflated cushion-19 with a` central hole 20 (Fig. 5),. 0r in order to secure a form (Fig. 6) which is more economical to manufacture the. design may be suchthat .it is formed as consisting of two centrallyerforate disks orwashers 21 and 22 the e ges of which arev separated by an eXtrathickness 23 of rubber so as to leave air between the disks.v TheVcentral portion being cornpressed, the air is locked in land forces outthe' edges giving a more satisfactory sealing when theaneck of thecontainer is irregular. In ordrto'ginsure the early lockingin ofvsufficient ai' the rubber should be somewhat f f ments for pluggingtightly the containing vessel when the componentpclamping parts aredrawn together to put clamping pressure upon the opposite faces of said'disk, insulated conductors leading from the posi"- tive and negativeelements to the exterior of the unit, one conductor being within theother, means for drawing the component clamping parts together, andfluid sealing means between said conductors, substantially as and forthe purposes described..

2. A removable stopper unit for the conl taining vessel of a closedgalvanic battery cell, including insulated positiveandn'egativeelements'comprising one element of 'a clamp, a cover plate forming thecomplementary clamp element, an expanding elastic disk coming betweensaid clamping elements for plugging tightly the containing vessel whenthe componentclamping l parts are drawn together -to put `clampingpressure upon the opposite faces .of said disk, insu;- lated conductorsleadingl from the positive and negative elements to the exterior of theg v.

unit, one conductor being within the other, the outside conductor beingformed as an exteriorly threaded tubulus, and the inside conductor beingformed as a screwedy stem, a v

nut screwed to the exteriorly threaded tubuk lus, a nut screwed to thesaid stem, and Huid sealing means between said conductors,subvstantially as and for the purposes'descr'ibed.

In testimony whereof I ax my signature vinpresence of two witnesses.

Witnesses: Y

ARTHUR Dnnronmnenn,

Amener 'Grenen Benner.

EDWARD Panetton-

